Mark Lettieri is an American guitarist, composer and producer. He is a member of the jazz fusion band Snarky Puppy, funk band The Fearless Flyers, and also performs with his quartet, the Mark Lettieri Group. His background spans several genres including jazz, rock and funk. He has released several solo albums. His 2021 album Deep: The Baritone Sessions Vol. 2 was nominated for a Grammy Award for Best Contemporary Instrumental Album.